Can I make my mobile prototype scroll horizontally?

At the moment there is no horizontal scroll functionality on mobile prototypes. We auto-fit the width to the device size. This is, however, on our radar for a future release.

If you're looking to add carousel-like functionality, we suggest you do animations in something like After Effects and upload animated GIFs. Then use a swipe-right hotspot to transition to the screen with the carousel scrolled horizontally and the scroll animation included.